Which benefit does a custom whitelist in the HP Network Protector SDN Application provide?

Which benefit does a custom whitelist in the HP Network Protector SDN Application provide?
A . It allows companies to override DNS policy enforcement removing any blocks on those sites in the HP DVLabs database. But custom blacklists can still block the sites.
B . It allows companies to override DNS policy enforcement removing any blocks on those sites in custom blacklists. But information from HP DVLabs can still block the sites.
C . It allows companies to override DNS policy enforcement removing any blocks on those sites in custom blacklists as well as the HP DVLabs database.
D . It allows companies to override DNS policy enforcement removing any blocks on those sites in custom greylists. Custom blacklists and information from HP DVLabs can still block the sites.

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Answer: A